Reversible eccentric



(No Model.)

W. W. LOGKWOOD.

REVERSIBLE EGGENTEIO'.

No. 400,095. Patented Mar; 26, 1889.

D K E I u 7% u: Pains. mwumu pw. ymmn UNITED STATES PATENT OFFICE.

IVILLIAM \V. LOOKIVOOD, OF FREEPORT, KANSAS.

REVERSIBLE ECCENTRIC.

SPECIFICATION forming part of Letters Patent No. 400,095, dated March 26,1889.

Application filed September 3, 1888. serial No. 284,394. (No model.)

To aZZ whom, it may concern.-

Be it known that I, \VILLIAM \V. LOOK- WOOD, a citizen of the United States, residing at Fre eport, in the county of Harper and State of Kansas, have invented certain new and useful Improvements in Reversible Eccentrics; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertainsto make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

This invention relates to eccentrics for steam, air,and gas engines, and has for its object the provision of an eccentric which can be readily subjected to reverse the engine, and which can be rotated on the shaft within cer tain limits to give the proper lead to the slidevalve.

A further object of the invention is to simplify the means whereby the eccentric is given its variety of movement, and to dispense with the link and hanger generally provided on the connecting-rod, and to reduce the number of joints, which not only add to the cost of the engine, but in a short time result in lost motion to the valve.

A still further object of the invention is to provide a direct connection between the slidevalve and the eccentric-and to have'the operating mechanism in as compact and simple a form as possible.

The improvement consists, first, in means for turning the said block 011 the shaft to adjust the eccentric, whereby the proper lead may be given to the valve; second, in the device for shifting the eccentric radially on the said block, and, lastly, in the peculiar construction and combination of parts, which will be hereinafter more fully described, and shown in the accompanying drawings, in which Figure 1 is a front View of one end of a crank-shaft embodying myinvention. Fig. 2 is a section on the line 00 0c of Fig. 1, looking to the right. Fig. Sis a section on the line g y of Fig. 1, looking to the left. Fig. 4 is a vertical longitudinal section on the line 2 z of Fig. 3.

The crank-shaft A, having the crank a, is of ordinary construction, and is shown simply to illustrate the application of my invention. The block B, mounted on the shaft A to turn thereon but held from sliding motion, is provided with the arm Z), which has the radial slot or channel I) in its outer end to receive the lateral projection don the bell-crank lever D, which is pivoted to the support C, held on the shaft A.

The outer end of the bell-crank lever D is ad justably connected with the eccentric E by any suitable means-as, for instance, by the rod F, which is pivoted at its lower end to the eccentric, and has its upper end adj ustably connected with the outer end of the bell-crank lever, preferably by the pin or bolt f, which passes through an opening in the end of the rod F and through one of the series of openings (Z in the said end of the bell-crank lever.

The support C being fixed relative to the shaft and the lower end of the rod F being fixed relative to the eccentric, obviously any variation in the distance between the pivotal support of the lever D and the pivotal connection of the rod F with the eccentric will.

change the position of the projection d and effecta turning of the block B on the shaft A. To turn the block B on the shaft, it is only necessary to vary the connection between the opposing ends of the bell-crank lever D and the rod F.

The eccentric Ea wheel or .lisk-is provided with a slot, 6. The ends of this slot extend to within about equal distances of the periphery of the eccentric. The eccentric is mounted on the block B, and is held thereon from lateral displacement by the flanges 12 The block is fitted in the slot 6, and is constructed to permit the eccentric to have a free sliding motion thereon.

The lever G, pivoted midway of its ends to the shaft A, has its arms 9 g bent to stand approximately at right angles to one another. The arm 9 is connected with the eccentric by the rod h. The arm g is connected with the sliding collar I on the shaft-A by means of the link H and the ring h, which ring fits in the groove of the said collar. Any well-known means for connecting the arm g with the collar I that will permit the sliding adjustment of the said collar on the shaft will answer.

This collar is held by t'cather-and-spline connection to the shaft, so that it will turn with the shaft and yet be free to slide thereon. The collar I is moved by any ordinary shipper-lever.

In practice, when the collar I is moved on the shaft, the lever G is turned on its pivot or axis, and the arm g is moved to or from the shaft A, and by means of the rod 71. effects a correspoinling movement of the eccentric E, shifting it radially relative to the shaft.

What- I claim as new is l. The combination, with the shatt and the eccentric, of the support 0, fixedly secured to the shaft, and the bell-crank lever interposed between the said support and the eccentric, substantially as set forth.

2. The combination, with the shaft, the eccentric, and the support, of the bell-crank lever pivoted to the support, and having its outer end adjustably connected with the said eccentric, substantially as described.

The combination, with the shaft, of the block having an arm, the eccentric mounted on the block, the support secured to the shaft, and the bell-crank lever pivoted to the support, and having its short arm in engagement with the arm of the block, and having its outerend adjustably connected with the eccentric, substantially as described.

4. The combination, with the shaftand the eccentric, ot the support (i, iixedl y secured to said shaft, the block mounted on said shaft, 1

the bell-crank lever pivoted on said support, with one end engaging an extension of said block, and the connection between the lever and the eccentric, substantially as shown and described.

5. The combination, with the shaft and the eccentric, of the support on said shaft, the block. 13, mounted on said shaft and formed with an a r-111,1), provided with a slot, 1), the bell-crank lever pivoted on said support and formed with a lateral wojection, (l, engaging said slot, and the rod F, connectin the lever and the eccentric, snhstantiall y as shown and dcscril ed.

(5. The combination of the shaft, the block mounted onthe shaft, the eccentric placed on the said block, the support secured to the shaft, the bell-crank lever pivoted to the support, and having its inner end in engagement with the said block, and having its outer end adj ustably connected with the eccentric, and the lever G, having its arms at about right angles to one another, one arm being connected with the eccentric and the other arm connected with the sliding collar on the shaft, substantially as and for the purpose set forth.

In testimony whereof I atlix my signature in presence of two witnesses.

*ILLIAlll \V. LOtlUVOOl).

Witnesses:

FRANK SHIELDS, 'l. A. Nonms. 

